There's a valve on the first stage that they're concerned about (looking at a "signature" problem, whatever that means). They think they can resolve their conce

There's a valve on the first stage that they're concerned about (looking at a "signature" problem, whatever that means). They think they can resolve their concerns and still make the launch window (which is a little over an hour long). Clock is running again now. Delay of roughly 20 mins to 22:55 UTC launch. Edit: so they counted down to T-6min then stopped and reset again to T-13mins due to a first stage internal power problem. They're waiting on trajectory coordination before trying a third time today. Edit 2: and they've aborted again at T-3:40 due to what looks like a LOX problem. That'll be it for today; the launch window has elapsed.